New data on the abundance of palladium in meteorites

Details New data on the abundance of palladium in meteorites New data on the abundance of palladium in meteorites

May 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979gecoa..43..747m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 43, May 1979, p. 747-753. Research supported by the Australian Research Grants Committee.

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Abundance, Carbonaceous Chondrites, Meteoritic Composition, Palladium, Chemical Fractionation, Iron Meteorites, Mass Ratios, Mass Spectroscopy, Nickel, Meteorites, Palladium, Concentrations, Achondrites, Stony Meteorites, Carbonaceous Chondrites, Chondrites, Iron Meteorites, Samples, Meteorite, Isotopes, Orgueil Chondrite, Nickel, Hypotheses, Origin, Composition

Scientific paper

The concentration of Pd in 7 carbonaceous chondrites, 18 ordinary chondrites, 3 achondrites, 29 iron meteorites and other samples has been determined by stable isotope dilution using solid source mass spectrometry. The C1 chondrite Orgueil gives a 'cosmic' abundance for Pd of 1.5 (Si = 1,000,000 atoms), in good agreement with the currently accepted value. The concentration of Pd shows little variation among the carbonaceous chondrites, but in ordinary chondrites decreases from the H to L to LL groups. Pd in achondrites is approximately 100 times lower than in chondrites. Data for iron meteorites plot around the 'cosmic' Pd/Ni ratio; however, the Pd data falls into distinct groups, corresponding to the chemical group classification. These results support the hypothesis that at least two fractionation processes have occurred during the formation of iron meteorites.

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